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Title: STRUCTURE MODIFICATION OF HYBRID ZIRCONIUM SOL-GEL COATINGS
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STRUCTURE MODIFICATION OF HYBRID ZIRCONIUM SOL-GEL COATINGS
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1314-2704
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English
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17
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61
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This paper reports the synthesis of hybrid zirconium sol-gel coatings by sol?gel process at room temperature (25 °C), using tetraethoxysilane (TEOS) as a precursor and different alkyltriethoxysilanes (RTES) with variable organic functionality (methyl, vinyl and octyl) as surface modifying agents. All silica materials was prepared with zirconium(IV) propoxide (as cross-linking agent), by keeping the molar ratio of TEOS:RTES at 1:1, in acidic conditions. The zirconium sol-gel films were obtained by depositing the final solution on a glass slide. We investigated the structure of the resulting films through Fourier transform infrared (FT-IR), UV?VIS-NIR spectrometry, and water contact angles measurement. All FT-IR spectra of hybrid films exhibit broad absorption bands located at 798 cm-1 and 1098 cm-1, respectively, which are assigned to the Si-O-Si symmetric and asymmetric stretching vibrations, and the band at 949 cm-1 corresponding to the Si-O group. It was observed that the obtained silica films present wettability properties when the RTES with hydrophobic organic group is added in solgel synthesis. The higher value of static water contact angle was obtained for the silica film prepared with TEOS+OTES (100±8°). The prepared hybrid coatings showed film uniformity and optical transparence.
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conference
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17th International Multidisciplinary Scientific GeoConference SGEM 2017
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17th International Multidisciplinary Scientific GeoConference SGEM 2017, 29 June - 5 July, 2017
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
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331-336
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29 June - 5 July, 2017
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website
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cdrom
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4392
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sol-gel process; hybrid coatings; zirconium(IV) propoxide
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